Aluminium pool fencing is more affordable and it can come in a lot of sizes and shapes. There is a large variety of designs you can choose from because metal is extremely versatile. About aluminium, Britannica says, Aluminum is the most abundant metallic element in Earth’s crust and the most widely used nonferrous metal. Because of its chemical activity, aluminum never occurs in the metallic form in nature, but its compounds are present to a greater or lesser extent in almost all rocks, vegetation, and animals.